Improvement in stop-cocks



W H. B ECKETT.

Stop-Cock.

Patented Feb. 16. |875.

THE GRAPHIO C0.PNOT0.LITN.39 B241 PARK PLACEJLY.

. TES

IMPROVEMENT IN STOP-COCKS.

Specification forming part of Letters Patent No. 159,746, dated February16, 1875; application filed July 7, 1874.

To all whom Iit may concern:

Be it known that I, WILLIAM HENRY BECK- ETT, of Chelmsford, England,engineer, have invented an Improvement in Stop-Cocks, ot' which thefollowing is a specification:

The invention relates to the use of metal disks or valve-plates, and tothe means by which motion is given to them for opening or closing thevalve-passages, so as to secure complete fitting of the valve-plates totheir seats for closing the passages, and yet admit of a free passagefor the liuid when desired.

But that the invent-ion may be fully understood, I will, by the aid ofthe accompanying drawings, proceed to describe means pursued by me incarrying the same into effect.

Figure l shows a longitudinal section, and Fig. 2 a transverse section,of apparatus arranged according to my invention. Eig. 3 is a sectionalplan of the same, taken through the line l l of Fig. l. Y

In each of the iigures the same letters indicate corresponding parts.

a a indicate the barrel ot' the valve apparatus by which connection ismade with the pipes of supply and delivery. b is the valve-chamber, andc c are the two valves or valve-plates. The edge of each ot' thesevalves or valveplates is formed with cogs or teeth c1, which are formedto take into corresponding cogs or teeth in racks el d, of which thereis one to each valve or valve-plate; but they are applied at oppositesides of the valve-chamber b. Each valve or valve-plate is also providedwith a stem, c2, with a thread thereon, adapted to take into acorresponding female screw formed in the lower part ofthe socket e. Thissocket c is also tapped transversely to receive the screw-thread of the.stem j', by which the socket e, together with the valves or valveplatesc c, may be raised or lowered. rIhe socket e is formed with, or hasapplied to it, projections or horns c e', to move vertically in groovesor between guide-plates b1 b1, formed in or applied to the interior ofthe valvechamber b. rlhe upper part of the spindle or stem j' is formedwith a collar, f1, to turn in the recess formed for it under thestuffing-box b2, through which the stem f rises, and is thereby madeHuid-tight. The stem f then has applied to it a wheel, f2, or othersuitable handle, by which it may be freely turned.

Upon turning the spindle f in one direction the socket e, with thevalves c c, will be raised, and in this rising of the valves orvalve-plates c c they will be caused to turn by their teeth c1 takinginto the teeth of the racks d, and in so rising' they will, by theturning of their spindles c2 in the socket e, be drawn away from theirvalve-seats, thus freeing' them 5 then, on turning the spindle j' in theopposite direction, the valves will be caused to rotate, or partiallyrotate, in the opposite direction, when the action oi' these threadedspindles c1 in the socket e will be to cause them, in their descentagain, to close firmly ou the valve-seats.

It will be observed that a very important advantage, arising out of thisrotary motion being given to the valves in their closing, is that thevalve-seats, as well as the surfaces of the valves brought in contactwith them, are scraped and cleansed in the act of, or before, nalclosing.

Having thus described my invention, and the means by which I carry thesame into effeet, what l claim, and desire to secure by Letters Patent,is

The combination of the toothed valves c c1 c2, racks d. socket e c', andscrew-spindle f, substantially as and for the purpose set forth.

In testimony whereof I have signed my name to this speciiication in thepresence of two subscribing witnesses.

- W. H. BEGKETT.

Witnesses:

J AMns G. NnYLor., W. FoLKns.

